尿道外切开术

automated external defibrillator pacemaker

external debt service ratio【金融】

external auditory

blood ejection and spontaneous external bleeding

internal-external upset tubing【油气】

capsula externa【解剖】[专业]棘球蚴\nectocyst【无脊椎】;epicyst【无脊椎】;external capsule【解剖】

external band of Baillarger

external angle to cove skirting